Add 72/20 and 28/12
1st number: 3 12/20, 2nd number: 2 4/12
72/20 + 28/12 is 89/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
72/20 = 72 × 3/20 × 3 = 216/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
28/12 = 28 × 5/12 × 5 = 140/60 - Add the two like fractions:
216/60 + 140/60 = 216 + 140/60 = 356/60 - 356/60 simplified gives 89/15
- So, 72/20 + 28/12 = 89/15
In mixed form: 514/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20+56/12 72/40+28/12 72/20+28/24 72/20+84/12 72/60+28/12 72/20+28/36 72/20+28/60 72/20+28/84